Q: 8x-2 equals -9 plus 7x

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-7x + 5 = -9 -7x = -14 7x = 14 x = 2

Subtract 7x from each side: 8 = -9 Not possible, game over.

7x + 9 = 51 7x = 42 x = 42/7 = 6

7x - 9 = 3x + 5 7x - 3x - 9 = 5 7x - 3x = 5 + 9 4x = 14 x = 14/4

x=-7/13

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-7x + 5 = -9 -7x = -14 7x = 14 x = 2

4x+9 = 7x+3 4x-7x = 3-9 -3x = -6 x = 2

Subtract 7x from each side: 8 = -9 Not possible, game over.

7x + 9 = 51 7x = 42 x = 42/7 = 6

79

7x + y + z = 6 7x + y + 4z = 9 y + x = 6 Take the first two statements and subtract them. 7x + y + z = 6 7x + y + 4z = 9 _____________ 0 + 0 - 3z = -3 Therefore: z = 1 Then you are left with: 7x + y + 1 = 6 7x + y + 4 = 9 which is impossible, so this is an impossible equation.

7x - 9 = 3x + 5 7x - 3x - 9 = 5 7x - 3x = 5 + 9 4x = 14 x = 14/4

-8x+7 = -7x-2 -8x = -7x-2-7 -8x=-7x-9 -8x+7x=-9 -1x=-9 x=-9/-1 x=9

7x + 9 = 6x + 17 7x - 6x = 17 -9 x = 8

x=-7/13

7x+x = 8x

x=(-9/7) 7x+12=3 7x=(-9) x=(-9/7)